`is_user_logged_in()` is a pluggable function, and loaded after plugins are loaded. If a plugin calls `__()` too early, `is_user_logged_in()` is missing and WordPress will fatal. `get_user_locale()` already handles this scenario for us, so it's safe to rely on exclusively.
See #44758.
Fixes#45235.
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While the documentation for `add_meta_box()` specifices that `$callback_args` should be an array, this has never been enforced, and we have workarounds in place for when it's passed as something other than an array.
Rather than break sites that are passing unexpected data, we can quietly just allow for it, instead.
Props johnjamesjacoby, birgire.
Fixes#45206.
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The block editor needs to duplicate the classic meta box behaviour, so it can extract the registered meta boxes, and import them into the block editor.
To match the classic editor behaviour as closely as possible, this moves the relevant code from the classic editor, into a new function, so it can be called by both.
Props pento, peterwilsoncc.
Fixes#45172.
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Label elements should only be used for labelable elements.
- `Uploaded By` and `Uploaded To` aren't form controls and shouldn't be associated with labels
- changes the labels for media source, alternate sources, poster image, and tracks to solve a layout issue and explicitly associate the labels to their form fields (previously, the labels were wrapping also the Remove buttons)
Merges [42444] to the 5.0 branch.
Props Presskopp, afercia.
Fixes#38759, #40468.
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Adds the `wp_set_script_translations` function which registers translations for a JavaScript file. This function takes a handle, domain and optionally a path and ensures JavaScript translation files are loaded if they exist.
Props atimmer, omarreiss, nerrad, swissspidy, ocean90.
Fixes#45103.
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Instead of requiring the packages individually this commit changes it so the packages are used from the packages repository (gutenberg). This is a solution that makes updating the packages easier, as long as we don't have a monorepo to manage both WordPress & the JavaScript packages together.
Props youknowriad, gziolo, omarreiss, herregroen.
See #45145.
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Adapts the response from `WP_oEmbed_Controller::get_proxy_item()` so that the response is correctly filtered and embeds work properly in JavaSccript editors. Introduces new `get_oembed_response_data_for_url()` function for preparing internal oEmbed responses.
Props danielbachhuber, imath, swissspidy.
Fixes#45142.
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The `@wordpress/editor` wasn't upgraded to the correct version in [43789].
This commit includes changes from the `@wordpress/block-library` upgrade in [43789], that weren't copied to the correct location in core.
This also regenerates the `package-lock.json` in Linux, which the build server requires.
See #45145.
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This update adds styles and theme support related to the new block-based editor to enhance the experience of using it with Twenty Seventeen.
These are the specific changes made to this theme:
* Add blocks.css, to style blocks on the front end, to make sure they match the theme’s existing HTML element styles.
* Add editor-blocks.css to style blocks in the editor, to make sure they match the theme’s existing HTML element styles.
* Add theme support for `editor-styles`, to pull the existing editor stylesheet into the new editor.
* Add theme support for `wp-block-styles`, to load the default block styles on the front end.
Props laurelfulford, ianbelanger, crunnells.
Fixes#45045.
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This update adds styles and theme support related to the new block-based editor to enhance the experience of using it with Twenty Sixteen.
These are the specific changes made to this theme:
* Add blocks.css, to style blocks on the front end, to make sure they match the theme’s existing HTML element styles.
* Add editor-blocks.css to style blocks in the editor, to make sure they match the theme’s existing HTML element styles.
* Add theme support for `editor-styles`, to pull the existing editor stylesheet into the new editor.
* Add theme support for `wp-block-styles`, to load the default block styles on the front end.
* Add theme support for `editor-color-palette`, to load a color palette based on the theme’s color scheme into the block-based editor.
Props laurelfulford.
Fixes#45044.
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This update adds styles and theme support related to the new block-based editor to enhance the experience of using it with Twenty Fifteen.
These are the specific changes made to this theme:
* Add blocks.css, to style blocks on the front end, to make sure they match the theme’s existing HTML element styles.
* Add editor-blocks.css to style blocks in the editor, to make sure they match the theme’s existing HTML element styles.
* Add theme support for `editor-styles`, to pull the existing editor stylesheet into the new editor.
* Add theme support for `wp-block-styles`, to load the default block styles on the front end.
* Add theme support for `editor-color-palette`, to load a color palette based on the theme’s color scheme into the block-based editor.
Props laurelfulford.
Fixes#45043.
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This update adds styles and theme support related to the new block-based editor to enhance the experience of using it with Twenty Fourteen.
These are the specific changes made to this theme:
* Add blocks.css, to style blocks on the front end, to make sure they match the theme’s existing HTML element styles.
* Add editor-blocks.css to style blocks in the editor, to make sure they match the theme’s existing HTML element styles.
* Add theme support for `editor-styles`, to pull the existing editor stylesheet into the new editor.
* Add theme support for `wp-block-styles`, to load the default block styles on the front end.
* Add theme support for `editor-color-palette`, to load a color palette based on the theme’s color scheme into the block-based editor.
Props laurelfulford, crunnells, ianbelanger.
Fixes#45042.
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This update adds styles and theme support related to the new block-based editor to enhance the experience of using it with Twenty Thirteen.
These are the specific changes made to this theme:
* Add blocks.css, to style blocks on the front end, to make sure they match the theme’s existing HTML element styles.
* Add editor-blocks.css to style blocks in the editor, to make sure they match the theme’s existing HTML element styles.
* Add theme support for `editor-styles`, to pull the existing editor stylesheet into the new editor.
* Add theme support for `wp-block-styles`, to load the default block styles on the front end.
* Add theme support for `editor-color-palette`, to load a color palette based on the theme’s color scheme into the block-based editor.
* Add theme support and styles for `align-wide`, to allow wide and full alignment styles on the blocks.
Props laurelfulford, ianbelanger.
Fixes#45041.
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This update adds styles and theme support related to the new block-based editor to enhance the experience of using it with Twenty Twelve.
These are the specific changes made to this theme:
* Add blocks.css, to style blocks on the front end, to make sure they match the theme’s existing HTML element styles.
* Add editor-blocks.css to style blocks in the editor, to make sure they match the theme’s existing HTML element styles.
* Add theme support for `editor-styles`, to pull the existing editor stylesheet into the new editor.
* Add theme support for `wp-block-styles`, to load the default block styles on the front end.
* Add theme support for `editor-color-palette`, to load a color palette based on the theme’s color scheme into the block-based editor.
Props ianbelanger, crunnells, laurelfulford.
Fixes#45040.
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This update adds styles and theme support related to the new block-based editor to enhance the experience of using it with Twenty Eleven.
These are the specific changes made to this theme:
* Add blocks.css, to style blocks on the front end, to make sure they match the theme’s existing HTML element styles.
* Add editor-blocks.css to style blocks in the editor, to make sure they match the theme’s existing HTML element styles.
* Add theme support for `editor-styles`, to pull the existing editor stylesheet into the new editor.
* Add theme support for `wp-block-styles`, to load the default block styles on the front end.
* Add theme support for `editor-color-palette`, to load a color palette based on the theme’s color scheme into the block-based editor.
Props ianbelanger, laurelfulford.
Fixes#45039.
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This update adds styles and theme support related to the new block-based editor to enhance the experience of using it with Twenty Ten.
These are the specific changes made to this theme:
* Add blocks.css, to style blocks on the front end, to make sure they match the theme’s existing HTML element styles.
* Add editor-blocks.css to style blocks in the editor, to make sure they match the theme’s existing HTML element styles.
* Add theme support for `editor-styles`, to pull the existing editor stylesheet into the new editor.
* Add theme support for `wp-block-styles`, to load the default block styles on the front end.
* Add theme support for `editor-color-palette`, to load a color palette based on the theme’s color scheme into the block-based editor.
Props nielslange, crunnells, laurelfulford.
Fixes#45038.
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Responsive embeds is a way for a theme to opt in to WordPress dynamically scaling the width/height of an embed. When a theme supports responsive embeds, a `wp-embed-responsive` class is added to the `<body>` tag. This information is also presented through the REST API for clients to respect.
Props desrosj.
Fixes#45125.
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The cover image block uses the `url()` function in its inline CSS, to show the cover image. KSES didn't allow this, causing the block to not save correctly for Author and Contributor users. As KSES does already check each attribute name against an allowed list, we're able to add an extra check for certain attributes to be able to use the `url()` function, too.
Props peterwilsoncc, azaozz, pento, dd32.
See #45067.
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When meta boxes are registered, they can use the `__back_compat_meta_box` and `__block_editor_compatible_meta_box` flags, to show whether this registration just exists for if the classic editor is loaded, and whether this meta box is compatible with the block editor.
When a meta box marks itself as incompatible with the block editor, and `WP_DEBUG` is enabled, a warning will show inside that meta box in the classic editor.
As all core meta boxes have been recreated in the block editor, they can be marked with the `__back_compat_meta_box` flag.
See #45112.
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Introduces new `determine_locale()` function for deciding the proper locale to use for a response. Default value is `get_user_locale()` in the admin, and `get_locale()` on the frontend. Because REST API requests are considered frontend requests, `?_locale=user` can be used to render the response in the user's locale.
Also updates `wp-login.php?wp_lang` implementation to benefit from this abstraction.
Props flixos90, mnelson4, swissspidy, TimothyBlynJacobs.
Fixes#44758.
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`WP_Text_Diff_Renderer_Table` is used to generate the diff view in revisions, but there were some cases that could cause it to take excessive amounts of time to run.
Some noteable cases include:
- When a large number of new lines were inserted in the middle of the post from one revision to the next.
- When both revisions contain >100 lines.
- When either revision contains a lot of long lines.
In one extreme test case, the diff view took over a minute to generate. With this change, it now takes less than a second.
See #35667.
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Narrow the scope of the included wp-admin files loaded for `wp_generate_attachment_metadata()`, `wp_handle_upload()`, `wp_tempnam()`, and `wp_handle_sideload()`. Requires only `wp-admin/includes/file.php` and `wp-admin/includes/image.php` instead of `wp-admin/includes/admin.php`.
Props ocean90, lonelyvegan, soulseekah, pratikthink.
Merges [43589], [43604] to the 5.0 branch.
Fixes#43757.
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* Adds `WP_REST_Autosaves_Controller` which extends `WP_REST_Revisions_Controller`.
* Autosaves endpoint is registered for all post types except `attachment` because even post types without revisions enabled are expected to autosave.
* Because setting the `DOING_AUTOSAVE` constant pollutes the test suite, autosaves tests are run last. We may want to improve upon this later.
Props adamsilverstein, aduth, azaozz, danielbachhuber, rmccue.
Fixes#43316.
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`rest_url()` inconsistent addes slashes to the passed path depending on whether the site has pretty permalinks enabled. Apart from being inconsistent, this also caused the unit tests to fail when pretty permalinks are enabled.
Props frank-klein.
Merges [42250] to the 5.0 branch.
Partially reverts [43720].
Fixes#42452. See #41451, #45017.
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- `grunt webpack:dev` now copies packages JS into `/src/wp-includes/js/dist`, and CSS into `/src/wp-includes/css/dist`.
- `grunt webpack:prod` does the same, but into `/build` instead of `/src`.
- `grunt build` now runs the `webpack:prod` task.
Props atimmer, pento.
Fixes#45119.
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The 409 error code is intended for situations where it is expected that the user will resolve the conflict and resubmit the same request. We use 400 error codes for other routes when a duplicate request is made. The 400 status code tells the user they need to modify their request for it to be successful.
Props shooper.
Merges [42354] to the 5.0 branch.
Fixes#42781. See #41370.
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The permissions error message when a request tries to fetch post statuses unauthenticated is incorrect. It was a copy/paste from elsewhere, as indicated by the use of "in this post type" where this is no post type referenced.
Props schlessera.
Merges [42356] to the 5.0 branch.
Fixes#42303.
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After [43738], TinyMCE would be loaded earlier than before, which
makes filters run at a different time relative to the loading of
TinyMCE. Fix this by calling `wp_print_scripts` at the location where
TinyMCE would previously be inserted as a `<script>` tag in the page.
Props azaozz, omarreiss.
Fixes#45065.
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The `WP_Block_Parser` class, and the accompanying `parse_blocks()` helper function, can be used to parse an array of blocks out of a content string.
`WP_Block_Parser` is copied from the `@wordpress/block-serialization-default-parser` package. To ensure it stays in sync with the JavaScript parser, changes should be implemented in the package first, then the package version should be upgraded to include the changes.
See #45109.
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These are the foundational classes allowing blocks to be registered and used throughout WordPress.
This commit also includes the `has_block()` and `has_blocks()` functions, which are required for unit testing these classes.
Props adamsilverstein, danielbachhuber, desrosj.
See #45097, #45109.
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Introduces a `WP_REST_Search_Controller` class which registers a `/wp/v2/search` endpoint. Search types are handled by extending `WP_REST_Search_Handler`. The default search type is `WP_REST_Post_Search_Handler` but can be filtered by plugins or a theme.
Props danielbachhuber, flixos90, pento, rmccue.
Fixes#39965.
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Adjusts the packages registration after [43723]:
* Combine the different registration functions into one
`wp_default_packages` function. To reach this goal move the prefix
logic into a function so it can be called from different locations.
Use a `static` variable there to prevent duplicate inclusion of
`version.php`.
* Call this function from the `wp_default_scripts` action by
registering it as a default filter.
* Combine some of the logic in `_WP_Editors::print_tinymce_scripts`
into `wp_register_tinymce_scripts`. The logic to force an uncompressed
TinyMCE script file stays in `_WP_Editors::force_uncompressed_tinymce`
because that logic is very specific to the classic editor.
* The script handle `wp-tinymce` is now a dependency of the `editor`
script handle. In combination with the previous item, this makes the
classic editor work.
* Adjust the syntax of the script paths to be more consistent with
other WordPress code.
* Always use `"production"` mode for the media files to prevent people
from inadvertently committing development files.
Props pento, omarreiss.
Fixes#45065.
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In order to correctly render parts of its UI, the new editor needs to be aware of the active theme's post-formats and post-thumbnails support. This data is exposed by querying for the active theme on a new /wp/v2/themes endpoint for sufficiently privileged users.
props desrosj.
Fixes#45016.
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Because WP REST API requests aren't identified until `parse_request`, it's impractical to reference the `REST_REQUEST` constant in `wp_debug_mode()`. Instead, it's more helpful to assume that a request wanting a JSON response probably doesn't want PHP errors breaking the response.
Props chrisl27, duanestorey, earnjam.
Fixes#44534.
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Object type-specific actions that should happen before or after modification of metadata have so far been part of the respective wrapper functions. By using action and filter hooks, this changeset ensures they are always executed, even when calling the lower-level Meta API functions directly, which the REST API does as a prime example.
Props flixos90, spacedmonkey.
Fixes#44467.
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In the full edit screen, CPTs that have disabled the `publicly_queryable` option will hide the slug field, as it doesn't need to be edited. This change brings the Quick Edit view into line with that behaviour.
Merges [43664] to the 5.0 branch.
Props bhargavmehta, krutidugade.
Fixes#43278.
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This functionality will cause the command to be retried up to three times in case of a non-zero return value. Implementing it on commands that perform network requests means that intermittent network failures are less likely to cause a build to fail, as they'll be retried up to three times.
Merges [43645] to the 5.0 branch.
Props johnbillion.
Fixes#44858.
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This allows the packages to be consumed by plugins and core itself.
The code has been based on the work done in the Gutenberg plugin.
We've added an array with all the packages and the vendor packages to
loop through. This sets a convention so all packages will be
registered in the same way. This array can eventually be generated by
a webpack plugin.
We need to register TinyMCE explicitly. Previously TinyMCE was used
by inserting custom `<script>` tags into the relevant admin pages.
This is not suitable for the new editor, so we need to explicitly
register TinyMCE. We could, in the future, refactor the custom
`<script>` tags to use the registered TinyMCE script instead.
Polyfills are inserted into the page only when necessary using
`document.write`.
Props omarreiss, herregroen, youknowriad, gziolo.
Fixes#45065.
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In order for clients to present permalink previews, the REST API must share the computed results of `get_sample_permalink()`. These two values are now exposed as `permalink_template` and `generated_slug` for public, viewable post types, but only for `context=edit`.
Props danielbachhuber, rahulsprajapati.
Fixes#45017.
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We decided to split the media webpack config into it's own file. The
main webpack config then combines this file with the packages config.
Include vendor scripts by copying them. We copy the minified files if
they are available. If they aren't available we minify the original
files ourselves.
Props omarreiss, herregroen, gziolo, youknowriad, netweb, adamsilverstein.
See #45065.
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The original REST API revisions controller relied on `wp_get_post_revisions()`, getting all revisions of a post without any possibility to restrict the result. This changeset replaces that function call with a proper `WP_Query` setup, replicating how `wp_get_post_revisions()` works while offering parameters to alter the default behavior.
Props adamsilverstein, birgire, flixos90.
Merges [43584-43586], [43647] to the 5.0 branch.
Fixes#40510.
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An authorized request with the `read_private_posts` capability for a post type should be able to `GET /wp/v2/posts` for posts of `status=private`. This query is further sanity-checked by `WP_REST_Posts_Controller->check_read_permission()`, which is unchanged.
Props rachelbaker, soulseekah, twoelevenjay.
Fixes#43701.
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* Minification is done by uglify, so disable that in the media build.
* The webpack boilerplate has changed, which explains the changes in the build files.
* `ModuleConcatenationPlugin` is enable by default for production builds so we don't have to specify that ourselves.
See #45065.
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Shrinkwraping is done to keep dependencies the same. Historically, WordPress Core has done it after a release. As the 5.0 branch was created from the 4.9.8 tag which was created from the 4.9 branch, it included it. The 5.0 branch will have some dependency updates so this shrinkwrap is not needed here.
See #45064.
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Because user capabilities can be modified at runtime, the REST API needs to expose them in some evaluated but declarative manner for clients to interpret. JSON Hyper Schema `targetSchema` provides an appropriate paradigm for doing so.
Props timothyblynjacobs.
Fixes#45014.
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For Gutenberg and other admin-type interfaces, it's
useful to be able to see the visibility settings for
taxonomies.
The original changeset was partially included in [43445].
Merges [42729], [42730], [42973] to the 5.0 branch.
Props joehoyle, TimothyBlynJacobs, pento.
Fixes#42707
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When Gutenberg is either not installed, or not activated, only show the callout to users with the `install_plugins` capability.
When Gutenberg is activated, expand that to include all users with the `edit_posts` capability.
4.9 branch commit.
Props pento.
Fixes#44680.
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* Introduce `try_gutenberg_learn_more_link` filter that allows hosts or site owners to change the link, to provide extra information about Gutenberg, specific to their service.
* Only display the "Install" buttons if we're able to directly write to disk to install the plugins.
* Make sure the "Dismiss" link works correctly.
Props pento, andrew.taylor, leemon.
Fixes#41316.
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Introduce an object_subtype argument to the args array for register_meta() which can be used to limit meta registration to a single subtype (e.g. a custom post type or taxonomy, vs all posts or taxonomies).
Introduce register_post_meta() and register_term_meta() wrapper methods for register_meta to provide a convenient interface for the common case of registering meta for a specific taxonomy or post type. These methods work the way plugin developers have often expected register_meta to function, and should be used in place of direct register_meta where possible.
Props flixos90, tharsheblows, spacedmonkey.
Merges [43378] to the 4.9 branch.
Fixes#38323.
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To encourage folks to prepare for Gutenberg, this new Dashboard box allows site users to easily install and try the Gutenberg plugin now, or to install the Classic Editor plugin before WordPress 5.0 is released.
Props pento, melchoyce, joen, karmatosed, joemcgill, SergeyBiryukov, jorbin, bph, Clorith, afercia, chanthaboune, chrislema, kjellr, matveb, michelleweber.
Fixes#41316.
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The `get_term()` mapping may result in term objects that are `null` or
`WP_Error` when plugins use `get_term` or a related filter. Since `null`
and error objects are not valid results for a term query, we discard
them.
Props GM_Alex.
Merges [43049] and [43491] to the 4.9 branch.
Fixes#42691.
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Some versions of PHP appear to have a memory leak that is occasionally triggered by calling `stream_get_wrappers()`. In order to avoid calling this, we can return early from `wp_is_stream()` when `$path` doesn't contain `://`.
Props pbiron, JPry, dontstealmyfish.
Merges [43466] to the 4.9 branch.
Fixes#44532.
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The `htmledit_pre` and `richedit_pre` filters have been deprecated since 4.3.0, since before `apply_filters_deprecated()` existed. They're now correctly run using `apply_filters_deprecated()`.
Props sebastienthivinfocom, lbenicio, ianbelanger.
Merges [43464] to the 4.9 branch.
Fixes#44341.
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The functions `send_confirmation_on_profile_email()`, `_wp_privacy_send_request_confirmation_notification()`, `_wp_privacy_send_erasure_fulfillment_notification()`, and `wp_send_user_request()` all include a title and URL indicating the current site. However, so far they have dealt with those values inconsistently, sometimes using the site values, other times using the network values if in a multisite. This changeset ensures that only the current site is taken into account in all cases and that special characters in the site name are consistently decoded.
Props subrataemfluence, desrosj.
Merges [43388], [43390], and [43435] to the 4.9 branch.
Fixes#44396.
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"Be more discrete." declared matt in [3155], and since then, "Silence is Golden" has been the calling card of placeholder index files. Historically, these have been php files, but [43012] changed that and added index.html files for privacy export generated folders.
The php silence files produce no visible content. This adds consistency with these new html files in that there will be no visible content. Silence will fall when the question is asked.
Merges [43446] to the 4.9 branch.
Fixes#44195.
Props audrasjb, rafsuntaskin, Ov3rfly, johnbillion, pento
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Historically, the REST API would generate the entire response object, including running expensive filters, then it would apply the `_fields` parameter, discarding the fields that weren't specificed.
This change causes `_fields` to be applied earlier, so that only requested fields are processed.
Merges [43087] to the 4.9 branch.
Props danielbachhuber.
See #43874.
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So that REST API clients can show appropriate UI for a post's revisions, it needs to know how many revisions the post has, and what the latest revision ID is.
Merge of [43439] and [43441] to the 4.9 branch.
Props kadamwhite, danielbachhuber, birgire, TimothyBlynJacobs, pento.
Fixes#44321.
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There are a variety of operations a WordPress user can only perform if they have the correct capabilities. A REST API client should only display UI for one of these operations if the WordPress user can perform the operation.
Rather than requiring REST API clients to calculate whether to display UI based on potentially complicated combinations of user capabilities, `targetSchema` allows us to expose a single flag to show whether the corresponding UI should be displayed.
This change also includes flags on post objects for the following actions:
- `action-publish`: The current user can publish this post.
- `action-sticky`: The current user can make this post sticky, and the post type supports sticking.
- `action-assign-author': The current user can change the author on this post.
- `action-assign-{$taxonomy}`: The current user can assign terms from the "$taxonomy" taxonomy to this post.
- `action-create-{$taxonomy}`: The current user can create terms int the "$taxonomy" taxonomy.
Merges [43437] to the 4.9 branch.
Props TimothyBlynJacobs, danielbachhuber.
Fixes#44287.
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WordCamps are celebrations of the local WordPress Community and once a local one is scheduled, people in that community should know it is coming. This adjusts the WordPress Events in the dashboard widgets to always display a WordCamp, even if there are multiple Meetups happening first.
Props iandunn, metalandcoffee, warmlaundry, alejandroxlopez, jorbin.
Merges [42726], [42728], and [43356] to the 4.9 branch.
Fixes#41112.
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When a term query using `fields=all_with_object_id` hits the cache, the
cached `stdClass` objects must be converted to `WP_Term` objects. This
was overlooked when `WP_Term_Query` was refactored to support object
queries in [38667].
Merges [43313] to the 4.9 branch.
Props dlh.
Fixes#44221.
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If a privacy policy has been set, then a link to it will automatically be shown in the footer.
The element containing the "Proudly powered by WordPress" link was chosen for the new policy link, in order to minimize visual conflicts with custom CSS that was written before the new link existed. Unfortunately, some minor conflicts are expected and unavoidable. Adding this link is required as part of GDPR compliance, and the benefits outweigh the downsides.
To further mitigate the conflicts, a new imprint class was added to the "Proudly powered..." link, in order to facilitate targeting each link invididually with custom styles.
This was accidentally not backported to the `4.9` branch before the beta/RC phase, but there was a consensus that it is safe to do that this late in the release cycle.
See https://wordpress.slack.com/archives/C02RQBWTW/p1526577643000132.
See https://wordpress.slack.com/archives/C02RQBWTW/p1526580781000240.
Props xkon, laurelfulford, birgire, azaozz, iandunn.
Merges [43051] to the 4.9 branch.
See #43715.
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A user is required to have the `manage_privacy_options` capability in order to determine which page is set as the privacy policy (the `wp_page_for_privacy_policy`). Given that, it doesn't make sense to allow users without that capability to edit or delete the page.
A similar situation exists with the `page_for_posts` and `page_on_front` options, but Editors are allowed to edit those pages. The reason that this situation is different is because it is more likely that an administrator will want to restrict modifications to the privacy policy, than it is that they will want to allow modifications. Modifications to the policy often require specialized knowledge of local laws, and can have implications for compliance with those laws.
Props dlh, desrosj.
Merges [43286] to the 4.9 branch.
Fixes#44079.
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